Deadly Diving? Physiological and Behavioural Management of Decompression Stress in Diving Mammals

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Deadly Diving? Physiological and Behavioural Management of Decompression Stress in Diving Mammals

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Title: Deadly Diving? Physiological and Behavioural Management of Decompression Stress in Diving Mammals
Author: Hooker, S. K.; Fahlman, A.; Aguilar de Soto, N.; Bernaldo de Quirós, Y.; Brubakk, A. O.; Costidis, A. M.; Dennison, S.; Falke, K. J.; Fitz-Clarke, J. R.; Garner, M. M.; Houser, D. S.; Jepson, P. D.; Kvadsheim, P. H.; Rowles, T. K.; Van Bonn, W.; Weathersby, P. K.; Weise, M. J.; Tyack, P. L.; Moore, M. J.; Costa, D. P.; Fernandez, A.; Ferrigno, Massimo; Ketten, Darlene; Madsen, P. T.; Pollock, Nira; Rotstein, D. S.; Simmons, S. E.; Williams, T. M.

Note: Order does not necessarily reflect citation order of authors.

Citation: Hooker, S. K., A. Fahlman, M. J. Moore, N. Aguilar de Soto, Y. Bernaldo de Quirós, A. O. Brubakk, D. P. Costa, et al. 2011. Deadly diving? Physiological and behavioural management of decompression stress in diving mammals. Proceedings of the Royal Society B 279(1731): 1041-1050.
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Abstract: Decompression sickness (DCS; ‘the bends’) is a disease associated with gas uptake at pressure. The basic pathology and cause are relatively well known to human divers. Breath-hold diving marine mammals were thought to be relatively immune to DCS owing to multiple anatomical, physiological and behavioural adaptations that reduce nitrogen gas (N\(_2\)) loading during dives. However, recent observations have shown that gas bubbles may form and tissue injury may occur in marine mammals under certain circumstances. Gas kinetic models based on measured time-depth profiles further suggest the potential occurrence of high blood and tissue N\(_2\) tensions. We review evidence for gas-bubble incidence in marine mammal tissues and discuss the theory behind gas loading and bubble formation. We suggest that diving mammals vary their physiological responses according to multiple stressors, and that the perspective on marine mammal diving physiology should change from simply minimizing N\(_2\) loading to management of the N\(_2\) load. This suggests several avenues for further study, ranging from the effects of gas bubbles at molecular, cellular and organ function levels, to comparative studies relating the presence/absence of gas bubbles to diving behaviour. Technological advances in imaging and remote instrumentation are likely to advance this field in coming years.
Published Version: doi:10.1098/rspb.2011.2088
Other Sources: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3267154/pdf/
Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:10303242
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